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Finding the Fourth Proportional to 530,430.45, 731,485.18 and 356,394.22

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Solution

The fourth proportional to 530,430.45, 731,485.18 and 356,394.22 is: 491,482.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,430.45 : 731,485.18 = 356,394.22 : x
  2. Step 2: Convert to fraction form
    530,430.45/731,485.18 = 356,394.22/x
  3. Step 3: Cross multiply
    530,430.45x = 731,485.18 × 356,394.22
  4. Step 4: Simplify right side
    530,430.45x = 260,697,090,167.66
  5. Step 5: Solve for x
    x = 260,697,090,167.66/530,430.45
  6. Step 6: Final answer
    x = 491,482.14

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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.