Home / 528,931.72-729,923.10-287,212.18

Finding the Fourth Proportional to 528,931.72, 729,923.10 and 287,212.18

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Solution

The fourth proportional to 528,931.72, 729,923.10 and 287,212.18 is: 396,351.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,931.72 : 729,923.10 = 287,212.18 : x
  2. Step 2: Convert to fraction form
    528,931.72/729,923.10 = 287,212.18/x
  3. Step 3: Cross multiply
    528,931.72x = 729,923.10 × 287,212.18
  4. Step 4: Simplify right side
    528,931.72x = 209,642,803,250.11
  5. Step 5: Solve for x
    x = 209,642,803,250.11/528,931.72
  6. Step 6: Final answer
    x = 396,351.35

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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.