Home / 918,123.40-1,377,314.70-286,971.40

Finding the Fourth Proportional to 918,123.40, 1,377,314.70 and 286,971.40

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Solution

The fourth proportional to 918,123.40, 1,377,314.70 and 286,971.40 is: 430,497.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,123.40 : 1,377,314.70 = 286,971.40 : x
  2. Step 2: Convert to fraction form
    918,123.40/1,377,314.70 = 286,971.40/x
  3. Step 3: Cross multiply
    918,123.40x = 1,377,314.70 × 286,971.40
  4. Step 4: Simplify right side
    918,123.40x = 395,249,927,699.58
  5. Step 5: Solve for x
    x = 395,249,927,699.58/918,123.40
  6. Step 6: Final answer
    x = 430,497.61

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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.