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Finding the Fourth Proportional to 708,649.62, 977,899.40 and 402,685.08

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Solution

The fourth proportional to 708,649.62, 977,899.40 and 402,685.08 is: 555,684.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,649.62 : 977,899.40 = 402,685.08 : x
  2. Step 2: Convert to fraction form
    708,649.62/977,899.40 = 402,685.08/x
  3. Step 3: Cross multiply
    708,649.62x = 977,899.40 × 402,685.08
  4. Step 4: Simplify right side
    708,649.62x = 393,785,498,120.95
  5. Step 5: Solve for x
    x = 393,785,498,120.95/708,649.62
  6. Step 6: Final answer
    x = 555,684.34

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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.