Finding the Fourth Proportional to 390,814,554.72, 539,333,455.70 and 212,205,971.07
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Solution
The fourth proportional to 390,814,554.72, 539,333,455.70 and 212,205,971.07 is: 292,849,327.94
Step by Step Solution
- Step 1: Write the proportion equation
390,814,554.72 : 539,333,455.70 = 212,205,971.07 : x - Step 2: Convert to fraction form
390,814,554.72/539,333,455.70 = 212,205,971.07/x - Step 3: Cross multiply
390,814,554.72x = 539,333,455.70 × 212,205,971.07 - Step 4: Simplify right side
390,814,554.72x = 114,449,779,697,357,328 - Step 5: Solve for x
x = 114,449,779,697,357,328/390,814,554.72 - Step 6: Final answer
x = 292,849,327.94
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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.