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Finding the Fourth Proportional to 391,547.40, 586,883.70 and 223,148.40

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Solution

The fourth proportional to 391,547.40, 586,883.70 and 223,148.40 is: 334,473.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,547.40 : 586,883.70 = 223,148.40 : x
  2. Step 2: Convert to fraction form
    391,547.40/586,883.70 = 223,148.40/x
  3. Step 3: Cross multiply
    391,547.40x = 586,883.70 × 223,148.40
  4. Step 4: Simplify right side
    391,547.40x = 130,962,158,641.08
  5. Step 5: Solve for x
    x = 130,962,158,641.08/391,547.40
  6. Step 6: Final answer
    x = 334,473.32

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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.