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Finding the Fourth Proportional to 620,377.19, 856,123.95 and 348,445.10

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Solution

The fourth proportional to 620,377.19, 856,123.95 and 348,445.10 is: 480,856.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,377.19 : 856,123.95 = 348,445.10 : x
  2. Step 2: Convert to fraction form
    620,377.19/856,123.95 = 348,445.10/x
  3. Step 3: Cross multiply
    620,377.19x = 856,123.95 × 348,445.10
  4. Step 4: Simplify right side
    620,377.19x = 298,312,191,089.53
  5. Step 5: Solve for x
    x = 298,312,191,089.53/620,377.19
  6. Step 6: Final answer
    x = 480,856.16

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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.