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Finding the Fourth Proportional to 514,438, 709,924.80 and 288,088.72

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Solution

The fourth proportional to 514,438, 709,924.80 and 288,088.72 is: 397,562.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,438 : 709,924.80 = 288,088.72 : x
  2. Step 2: Convert to fraction form
    514,438/709,924.80 = 288,088.72/x
  3. Step 3: Cross multiply
    514,438x = 709,924.80 × 288,088.72
  4. Step 4: Simplify right side
    514,438x = 204,521,326,928.26
  5. Step 5: Solve for x
    x = 204,521,326,928.26/514,438
  6. Step 6: Final answer
    x = 397,562.64

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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.