Home / 712,521.42-983,253.09-390,234.16

Finding the Fourth Proportional to 712,521.42, 983,253.09 and 390,234.16

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Solution

The fourth proportional to 712,521.42, 983,253.09 and 390,234.16 is: 538,508.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,521.42 : 983,253.09 = 390,234.16 : x
  2. Step 2: Convert to fraction form
    712,521.42/983,253.09 = 390,234.16/x
  3. Step 3: Cross multiply
    712,521.42x = 983,253.09 × 390,234.16
  4. Step 4: Simplify right side
    712,521.42x = 383,698,943,643.55
  5. Step 5: Solve for x
    x = 383,698,943,643.55/712,521.42
  6. Step 6: Final answer
    x = 538,508.64

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Double scale
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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.