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Finding the Fourth Proportional to 908,805.47, 1,363,485.06 and 429,401.40

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Solution

The fourth proportional to 908,805.47, 1,363,485.06 and 429,401.40 is: 644,232.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,805.47 : 1,363,485.06 = 429,401.40 : x
  2. Step 2: Convert to fraction form
    908,805.47/1,363,485.06 = 429,401.40/x
  3. Step 3: Cross multiply
    908,805.47x = 1,363,485.06 × 429,401.40
  4. Step 4: Simplify right side
    908,805.47x = 585,482,393,643.08
  5. Step 5: Solve for x
    x = 585,482,393,643.08/908,805.47
  6. Step 6: Final answer
    x = 644,232.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.