Home / 708,361.40-977,561.56-402,432.20

Finding the Fourth Proportional to 708,361.40, 977,561.56 and 402,432.20

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Solution

The fourth proportional to 708,361.40, 977,561.56 and 402,432.20 is: 555,369.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,361.40 : 977,561.56 = 402,432.20 : x
  2. Step 2: Convert to fraction form
    708,361.40/977,561.56 = 402,432.20/x
  3. Step 3: Cross multiply
    708,361.40x = 977,561.56 × 402,432.20
  4. Step 4: Simplify right side
    708,361.40x = 393,402,249,226.23
  5. Step 5: Solve for x
    x = 393,402,249,226.23/708,361.40
  6. Step 6: Final answer
    x = 555,369.40

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.