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Finding the Fourth Proportional to 528,041.72, 728,823.66 and 313,306.40

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Solution

The fourth proportional to 528,041.72, 728,823.66 and 313,306.40 is: 432,437.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,041.72 : 728,823.66 = 313,306.40 : x
  2. Step 2: Convert to fraction form
    528,041.72/728,823.66 = 313,306.40/x
  3. Step 3: Cross multiply
    528,041.72x = 728,823.66 × 313,306.40
  4. Step 4: Simplify right side
    528,041.72x = 228,345,117,149.42
  5. Step 5: Solve for x
    x = 228,345,117,149.42/528,041.72
  6. Step 6: Final answer
    x = 432,437.64

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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.